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TCA9801DGKR

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$ 0.75

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Texas Instruments TCA9801DGKR

The TCA9801 is a dual-channel bidirectional buffer
intended for I2C bus and SMBus/PMBus systems. It provides bidirectional
level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and
higher voltages (1.65 V to 3.6 V). The TCA9801 features an
internal current source on the B-side of the device, allowing the removal of external pull-up
resistors on the B-side. The current source also provides an improved rise time and ultra-low power
consumption.

The TCA9801 is able to provide true buffering (rather
than a pass-FET solution) without using a static voltage offset or incremental offset. This means
that the VOL on both the A and B sides of the TCA9801 are very low (approximately 0.2 V),
helping to eliminate communication issues as a result of fixed VIL
thresholds. Another key feature of the TCA9801 is that
there are no power sequencing requirements, or power supply dependencies. VCCA
can be greater than, less than, or equal to VCCB. This gives the
system designer flexibility with how the TCA9801 is
used.

The TCA9801 is part of a four device family with
varying current source strengths (see the Device Comparison Table).